Air cooling area steam baffle structure and condenser with same

Abstract

The application discloses an air cooling area steam baffle structure and a condenser with the same, and relates to the technical field of steam turbine auxiliary equipment. The application comprises a steam baffle body, which is arranged in the notches of a plurality of support plates. One end of the steam baffle body close to the center of the support plate is provided with a hook-shaped groove structure. The other end of the steam baffle body away from the center of the support plate is connected with a spring sheet arranged along the length direction. One end of the spring sheet along the width direction extends outward from the steam baffle body. The outward extending section of the spring sheet is used to abut against the outer wall of the steam extraction pipe. The outward extending section of the spring sheet is elastically bent and deformed by being pressed by the outer wall of the steam extraction pipe. The elastic recovery of the spring sheet is used to establish a continuous compression sealing contact pair. The assembly interference problem in the pipe bundle assembly process can be effectively avoided. Meanwhile, the spring sheet can adaptively compensate the position deviation between the outer wall of the steam extraction pipe and the steam baffle, the sealing performance of the air cooling area is ensured, the assembly difficulty of the condenser is reduced, and the pipe bundle working condition with a large axial length and a large number of support plates is adapted.

Description

Technical Field

[0001] This invention relates to the field of steam turbine auxiliary equipment technology, specifically to an air-cooled zone baffle plate structure and a condenser having the same. Background Technology

[0002] The air-cooled zone of the small cylindrical condenser is equipped with a baffle plate structure. Existing conventional baffle plates are generally made by stamping or machining a single piece of steel plate. After the baffle plate is welded to the extraction pipe as a whole, it is then welded to the shell cylinder to form a shell assembly. Subsequently, the shell assembly is fitted onto the outside of the tube bundle to complete the assembly operation. The tube bundle is mainly composed of components such as a single-sided tube sheet, multiple support plates, heat exchange tubes, tie rods, and spacer tubes.

[0003] Traditional assembly methods require strict control over the dimensional accuracy of components and the tolerance of assembly fit. The slot dimensions of the extraction pipes and baffles machined on each support plate must be consistent, and the slots must be strictly coaxially aligned during the assembly of the support plates. Otherwise, the extraction pipes and baffles on the shell assembly may not be able to be smoothly inserted into the pre-set slots of each support plate, resulting in assembly failure. This is especially true when the axial length of the condenser tube bundle is large, the number of support plates is large, and a double extraction pipe and double baffle arrangement is adopted. The assembly gap is tight, the probability of assembly interference is high, and the assembly implementation is difficult. Summary of the Invention

[0004] The purpose of this invention is to solve the problem of high assembly difficulty when using a double extraction pipe and double baffle arrangement. Therefore, it provides a baffle structure for an air-cooled zone and a condenser incorporating it.

[0005] The technical solution of the present invention is: a steam baffle plate for an air-cooled zone, comprising: a steam baffle plate body for being inserted into the slots of multiple support plates;

[0006] The steam baffle plate body has a hook-shaped groove structure at one end near the center of the support plate, and a spring sheet arranged along the length direction is connected to the other end of the steam baffle plate body away from the center of the support plate. The end of the spring sheet along the width direction extends outward from the steam baffle plate body.

[0007] The extended section of the spring sheet is used to abut against the outer wall of the extraction pipe. The spring sheet can undergo elastic bending deformation under the squeezing action of the outer wall of the extraction pipe, and form a continuously pressed sealing contact pair by means of its own elastic restoring force.

[0008] Furthermore, the spring sheet is fixed to the baffle plate body by bolts.

[0009] Furthermore, both the steam baffle plate body and the spring sheet are provided with a number of circular holes spaced apart along the length direction, and one end of the bolt is respectively inserted into a number of the circular holes and threaded with a nut.

[0010] Furthermore, it also includes: a pressure bar, sandwiched between the plurality of said nuts and said spring plates.

[0011] Furthermore, the pressure bar is provided with a plurality of circular holes spaced apart along its length for the bolts to pass through.

[0012] Furthermore, the spring sheet is composed of multiple thin steel plates stacked together.

[0013] Furthermore, each of the thin steel plates is provided with a plurality of circular holes spaced apart along its length for the bolts to pass through.

[0014] Furthermore, the pressure strip is formed from flat steel.

[0015] Furthermore, the steam baffle plate body is formed by stamping or machining from a steel plate.

[0016] A condenser includes: a shell assembly, a tube bundle assembly, and an air-cooled zone baffle plate structure as described in any one of the above embodiments, wherein the baffle plate body of the air-cooled zone baffle plate structure passes through the slots of a plurality of support plates of the tube bundle assembly and is welded to the support plates.

[0017] The housing assembly is coaxially sleeved on the outside of the tube bundle assembly, and the extended section of the spring plate of the air-cooled zone baffle plate structure abuts against the outer wall of the extraction pipe of the housing assembly.

[0018] Compared with the prior art, the present invention has the following advantages:

[0019] 1. The air-cooled zone baffle plate structure provided by this invention relies on the elastic bending deformation of the extended section of the spring plate caused by the compression of the outer wall of the extraction pipe. It utilizes the elastic restoring force of the spring plate itself to establish a continuous pressing and sealing contact pair. It does not require strict control of the coaxiality of the support plate slot, the machining dimensions of the parts, and the assembly fit tolerances. It can effectively avoid the assembly interference problem that occurs during the tube bundle assembly process. At the same time, the spring plate can adaptively compensate for the positional deviation between the outer wall of the extraction pipe and the baffle plate, ensuring the sealing performance of the air-cooled zone, reducing the assembly difficulty of the entire condenser, and adapting to tube bundle working conditions with large axial length and a large number of support plates. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0021] Figure 2 yes Figure 1 Enlarged view of region A in the middle;

[0022] Figure 3 yes Figure 1 Enlarged view of the middle baffle plate body;

[0023] Figure 4 yes Figure 3 Side view;

[0024] Figure 5 yes Figure 1 Enlarged view of the middle housing assembly;

[0025] Figure 6 yes Figure 1 Enlarged view of the central tube bundle assembly.

[0026] In the diagram: 1. Steam baffle plate body; 2. Support plate; 3. Groove; 4. Hook-shaped groove structure; 5. Spring plate; 6. Steam extraction pipe; 7. Pressure strip. Detailed Implementation

[0027] Specific implementation method one: Combining Figures 1 to 6 This embodiment describes a steam baffle plate body 1, which is used to pass through the slots 3 of multiple support plates 2. One end of the steam baffle plate body 1 near the center of the support plate 2 is processed into a hook-shaped groove structure 4. The end of the steam baffle plate body 1 away from the center of the support plate 2 is connected to a spring sheet 5 arranged along the length direction. One end of the spring sheet 5 extends outward from the steam baffle plate body 1 along the width direction. The extended section of the spring sheet 5 is used to abut against the outer wall of the extraction pipe 6. The spring sheet 5 can undergo elastic bending deformation under the squeezing action of the outer wall of the extraction pipe 6, and form a continuously pressed sealing contact pair by means of its own elastic restoring force.

[0028] The baffle plate structure in the air-cooled zone of this embodiment relies on the elastic bending deformation of the extended section of the spring plate 5 caused by the compression of the outer wall of the extraction pipe 6. The spring plate 5 itself uses its elastic restoring force to establish a continuous pressing and sealing contact pair. There is no need to strictly control the coaxiality of the groove 3 of the support plate 2, the machining dimensions of the parts, and the assembly fit tolerances. This can effectively avoid the assembly interference problems that occur during the tube bundle assembly process. At the same time, the spring plate 5 can adaptively compensate for the positional deviation between the outer wall of the extraction pipe 6 and the baffle plate, ensuring the sealing performance of the air-cooled zone, reducing the assembly difficulty of the entire condenser, and adapting to tube bundle working conditions with large axial length and a large number of support plates 2.

[0029] Specific Implementation Method Two: Combining Figures 2 to 4 This embodiment differs from specific embodiment one in that the spring plate 5 is fixed to the baffle plate body 1 by bolts. Using bolts to connect and fix the spring plate 5 to the baffle plate body 1, unlike welding, facilitates disassembly and assembly. When the spring plate 5 shows wear or fatigue failure, it can be disassembled and replaced individually without replacing the entire baffle plate body 1, reducing component maintenance and replacement costs. Simultaneously, the bolt connection allows adjustment of the clamping preload of the spring plate 5, facilitating control of the initial elastic deformation allowance. Other components and connections are the same as in specific embodiment one.

[0030] Specific implementation method three: Combining Figures 2 to 4 This embodiment differs from Specific Embodiment Two in that the baffle plate body 1 has multiple sets of spaced-apart circular through holes drilled along its length. Similarly, the spring plate 5 has multiple sets of spaced-apart circular through holes drilled at the corresponding positions of the circular holes in the baffle plate body 1. The bolt rod passes sequentially through the circular through holes in the spring plate 5 and the baffle plate body 1. The protruding part of the bolt rod is screwed into a nut, and the end face of the nut presses against the surface of the baffle plate body 1 or the spring plate 5 to complete the locking. This multi-point fixing structure also improves the vibration resistance of the spring plate 5 and reduces the risk of the spring plate 5 loosening and falling off under condenser operating vibration conditions. Other components and connections are the same as in Specific Embodiment Two.

[0031] Specific implementation method four: Combination Figures 2 to 4 This embodiment differs from Specific Embodiment Three in that it further includes a pressure strip 7, sandwiched between multiple nuts and spring plates 5. The locking force of the nuts is distributed and transmitted to the spring plate 5 through the pressure strip 7, preventing the nuts from directly contacting the spring plate 5 and causing localized indentations, stress concentrations, or even crushing damage to the spring plate 5. This protects the structural integrity of the spring plate 5 and increases the clamping contact area, resulting in a more uniform distribution of clamping force along the length of the spring plate 5. Other components and connections are the same as in Specific Embodiment Three.

[0032] Specific Implementation Method Five: Combining Figures 2 to 4 This embodiment differs from specific embodiment four in that the pressure strip 7 has several circular holes spaced along its length for the bolts to pass through, providing a passage for the bolt shank. This allows for the positioning and installation of the pressure strip 7, preventing lateral movement or displacement during the tightening process. It ensures that the pressure strip 7 stably covers the area of ​​the spring sheet 5 that needs to be compressed, guaranteeing uniform pressure transmission. Other components and connections are the same as in specific embodiment four.

[0033] Specific Implementation Method Six: Combination Figures 2 to 4 This embodiment differs from Specific Embodiment Two in that the spring sheet 5 is composed of multiple thin steel plates stacked together. Five 0.2mm steel plates or eight 0.125mm steel plates can be used. The stacked structure allows for greater elastic deformation while maintaining overall rigidity. Even if a single thin steel plate is damaged, the remaining plates can still maintain sealing and clamping capabilities, resulting in higher fault tolerance. Other components and connections are the same as in Specific Embodiment Two.

[0034] Specific implementation method seven: Combining Figures 2 to 4This embodiment differs from Specific Embodiment Six in that each thin steel plate has several circular holes spaced apart along its length for bolts to pass through. This allows the bolt shank to pass through all the stacked thin steel plates sequentially, achieving unified locking and positioning of all the thin steel plates. This prevents interlayer misalignment and slippage between the thin steel plates, ensuring that the stacked thin steel plates form an integral load-bearing structure. Other components and connections are the same as in Specific Embodiment Six.

[0035] Specific implementation method eight: Combination Figures 2 to 4 This embodiment differs from specific embodiment four in that the pressure strip 7 is formed from flat steel, making it less prone to bending and deformation under pressure, thus ensuring the flatness of the pressure strip 7. During locking, it can output evenly distributed pressure, reducing the likelihood of localized warping of the pressure strip 7 leading to clamping failure. Other components and connections are the same as in specific embodiment four.

[0036] Specific Implementation Method Nine: Combining Figures 2 to 4 This embodiment differs from specific embodiment one in that the steam baffle body 1 is formed from steel plate by stamping or machining. Stamping has high production efficiency and is suitable for mass production; machining has high dimensional accuracy and is suitable for small-batch customization. Both forming processes can ensure the forming quality of structures such as hook grooves and mounting holes. Other components and connections are the same as in specific embodiment one.

[0037] Specific Implementation Method Ten: Combining Figures 1 to 6 This embodiment also provides a condenser, including: a shell assembly, a tube bundle assembly, and the aforementioned air-cooled zone baffle structure. The tube bundle assembly includes multiple support plates 2. The baffle body 1 of the air-cooled zone baffle structure is inserted into the slot 3 of each support plate 2. The side wall of the baffle body 1 is welded to the slot wall of the support plate 2, and the two are welded and fixed together. The shell assembly is coaxially mounted to the outside of the tube bundle assembly. The spring plate 5 of the air-cooled zone baffle structure has its outwardly extending end face straight... The aforementioned air-cooled zone baffle plate structure is applied to the condenser by abutting against the outer cylindrical wall of the extraction pipe 6 of the shell assembly. The baffle plate body 1 is inserted into the slot 3 of the tube bundle assembly support plate 2 and welded and fixed. The spring plate 5 relies on elastic deformation to abut and seal against the outer wall of the extraction pipe 6. During assembly, the shell assembly is directly coaxially sleeved onto the tube bundle assembly. The spring plate 5 adaptively compensates for positional deviations, greatly reducing the assembly difficulty of the entire condenser, avoiding assembly interference problems caused by coaxiality deviation of the slot 3 of the support plate 2, and ensuring the sealing effect of the air-cooled zone of the condenser.

[0038] The scope of this invention is not limited to the above-described embodiments; a combination of one or more specific embodiments can also achieve the purpose of the invention.

Claims

1. A steam baffle structure for an air-cooled zone, characterized in that, include: The steam baffle body (1) is used to pass through the slots (3) of multiple support plates (2); The steam baffle plate body (1) is provided with a hook-shaped groove structure (4) at one end near the center of the support plate (2), and a spring sheet (5) arranged along the length direction is connected to the other end of the steam baffle plate body (1) away from the center of the support plate (2). The spring sheet (5) extends outward from the steam baffle plate body (1) along the width direction. The extended section of the spring sheet (5) is used to abut against the outer wall of the extraction pipe (6). The spring sheet (5) can undergo elastic bending deformation under the squeezing action of the outer wall of the extraction pipe (6) and form a continuously pressed sealing contact pair by means of its own elastic restoring force.

2. The air-cooled zone baffle structure according to claim 1, characterized in that, The spring sheet (5) is fixed to the steam baffle body (1) by bolts.

3. The air-cooled zone baffle structure according to claim 2, characterized in that, Both the steam baffle plate body (1) and the spring plate (5) are provided with a number of round holes at intervals along the length direction. One end of the bolt is respectively inserted into the multiple round holes and threaded with a nut.

4. The air-cooled zone baffle structure according to claim 3, characterized in that, Also includes: A pressure bar (7) is sandwiched between the plurality of nuts and the spring plates (5).

5. The air-cooled zone baffle structure according to claim 4, characterized in that, The pressure strip (7) has a number of circular holes spaced apart along its length for the bolts to pass through.

6. The air-cooled zone baffle structure according to claim 2, characterized in that, The spring sheet (5) is composed of multiple thin steel plates stacked together.

7. The air-cooled zone baffle structure according to claim 6, characterized in that, Each of the thin steel plates has a number of circular holes spaced apart along its length for the bolts to pass through.

8. The air-cooled zone baffle structure according to claim 4, characterized in that, The pressure strip (7) is formed from flat steel.

9. The air-cooled zone baffle structure according to claim 1, characterized in that, The steam baffle plate body (1) is formed by stamping or machining of steel plate.

10. A condenser, characterized in that, include: The housing assembly, the tube bundle assembly, and the air-cooled zone baffle structure according to any one of claims 1-9, wherein the baffle body (1) of the air-cooled zone baffle structure passes through the slots (3) of the plurality of support plates (2) of the tube bundle assembly and is welded to the support plates (2); The housing assembly is coaxially sleeved on the outside of the tube bundle assembly, and the extended section of the spring plate (5) of the air-cooled zone baffle plate structure abuts against the outer wall of the extraction pipe (6) of the housing assembly.

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